Freight-car door



(No Model.)

B. H. WHITAKER.

FREIGHT GAR DOOR.

Patented Feb. 5, 1889.

- PIE 3:-

FE 1v 11 NITED STATES EDWARD HAMILTON WHITAKER, OF BALTIMORE, MARYLAND.

FREIGHT-CAR DOOR.

SPECIFICATION forming part of Letters Patent No. 397,322, dated February5, .1889.

Application filed June 25, 1888. Serial No. 278,101. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD HAMILTON IVHITAKER, of the city of Baltimoreand State of Maryland, have invented certain Improvements in aVentilating Freight-Car Door, of which the following is a specification.

In the description of the said invention which follows reference is madeto the accompanying drawings, forming a part hereof,

and in which- Figure I is afront elevation of the improved ventilatingcar-door with the ventilating apparatus closed, and Fig. II a similarview with the ventilating devices open. Figs. III and IV are enlargedsections of portions of the invention, Fig. III being taken on the linea; 00, Fig. II, and Fig. IV on the line y 1 Fig. I. Fig. V is anenlarged view of Fig. II, except that a portion only is shown, and thatwithout a plate hereinafter described.

Similar letters of reference indicate similar parts in all'the figures.

In the said drawings, A represents the door, which in the present caseis provided with two ventilation-openings, a.

B B are slats pivoted within the openings at by means of the pins 1).These slats are made to lap each other, and in order that when they areso lapped they will present at the front and rear of the door plain orflush surfaces they are rabbeted to one-half their thickness at theiredges, as shown particularly in Fig. III, in which the rabbets aredenoted by c. The inner edges of each set of slats are united by meansof a bar, d, connected to the slats bypins e. The opening and closing ofthe slats is accomplished through the agency of two cranks, O, on ashaft, D, which is placed in a vertical position in the portion of thedoor situated between the openings at, a toothed segment, E, on theshaft between the said cranks, and a worm-wheel, F, on a horizontalshaft, f, to the outer end of which maybe applied a crank handle,wrench, or other similar device to turn it. Pins (,projecting from thebars (I, rest loosely in holes in the outer ends of the cranks, and thehorizontal shaft f is confined or held in place by means of the plates hand 1'.

An aperture, G, in the door allows the toothed segmentand worm to havefree movement, as will be seen by reference to Fig. V, which shows aportion of the door without plate 1'.

The operation of the invention is so simple that it requires no specialdescription herein.

It will be seen that the slats can only be moved through the medium ofthe worm and the toothed segment in gear therewith, and that the slatsremain stationary in any position in which they are placed within therange of their movement.

I claim as my invention 1. In a freight-car door having aventilation-opening, a series of pivoted slats situated in the saidopening united by means of pins to a bar, combined with a crankconnected loosely to the said bar and having on its shaft a toothedsegment, and a worm-wheel on a shaft in gear with the said toothedsegment and adapted for operation from the outside of the door,substantially as and for the purpose specified.

2. In a freight-car door, a series of ventilating pivoted slats havingtheiredges rabbeted to one-half their thickness, so that they mayoverlap to form a plain or flush surface, substantially as and for thepurpose specified.

EDWARD HAMILTON WHITAKER.

WVitnesses:

H. M. FITZHUGH, DANL. FISHER.

